title: Impact of CYP2C19 polymorphism on platelet function tests and coagulation and inflammatory biomarkers in patients undergoing percutaneous coronary intervention.
abstract: OBJECTIVE
  Carriers of the reduced-function CYP2C19 allele receiving dual antiplatelet therapy (DAPT) with aspirin and clopidogrel exhibit diminished platelet inhibition and an increased risk of events. The purpose of this study was to investigate the effects of CYP2C19 gene variants on platelet function tests and coagulation and inflammatory biomarkers in patients undergoing elective percutaneous coronary intervention (PCI).
  
  
  METHODS
  This prospective, observational, multicenter study enrolled 104 consecutive Japanese patients undergoing elective PCI. We examined the CYP2C19 genotype, platelet function tests, the levels of coagulation and inflammatory biomarkers and the serum levels of high-sensitivity troponin T (hs-TnT) before, immediately after and one, two and 28 days after PCI.
  
  
  RESULTS
  A total of 68 (65%) of the 104 enrolled patients were carriers of the CYP2C19 reducedfunction allele. On-clopidogrel platelet aggregation (PA), measured using light transmittance aggregometry and the VerifyNow(®) P2Y12 system, and the platelet reactivity index (PRI) were significantly higher at all time points in the carriers than in the noncarriers (p＜0.05), whereas there were no differences in the levels of the coagulation and inflammatory biomarkers or serum hs-TnT. Simple and multiple logistic regression analyses identified on-clopidogrel PA and PRI as being significant predictors of carriers of the CYP2C19 reduced-function allele.
  
  
  CONCLUSIONS
  The present study suggests that platelet function tests, but not coagulation, inflammatory or cardiac biomarkers, are useful for identifying carriers of CYP2C19 reduced-function gene variants and monitoring the efficacy of DAPT in patients undergoing elective PCI.
authors.affiliation: Department of Cardiovascular Medicine, Graduate School of Medical Sciences, Kumamoto University.
authors.forename: Koichi
authors.initials: K
authors.lastname: Kaikita
authors.forename: Takamichi
authors.initials: T
authors.lastname: Ono
authors.forename: Satomi
authors.initials: S
authors.lastname: Iwashita
authors.forename: Naoki
authors.initials: N
authors.lastname: Nakayama
authors.forename: Koji
authors.initials: K
authors.lastname: Sato
authors.forename: Eiji
authors.initials: E
authors.lastname: Horio
authors.forename: Shinichi
authors.initials: S
authors.lastname: Nakamura
authors.forename: Kenichi
authors.initials: K
authors.lastname: Tsujita
authors.forename: Shinji
authors.initials: S
authors.lastname: Tayama
authors.forename: Seiji
authors.initials: S
authors.lastname: Hokimoto
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Koichi
authors.initials: K
authors.lastname: Nakao
authors.forename: Shuichi
authors.initials: S
authors.lastname: Oshima
authors.forename: Seigo
authors.initials: S
authors.lastname: Sugiyama
authors.forename: Hisao
authors.initials: H
authors.lastname: Ogawa
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001189:Aryl Hydrocarbon Hydroxylases / Q000235:genetics* / Q000378:metabolism; D015415:Biomarkers / Q000378:metabolism; D001777:Blood Coagulation / Q000187:drug effects / Q000235:genetics*; D065731:Cytochrome P-450 CYP2C19; D005260:Female; D005838:Genotype; D006579:Heterozygote; D006801:Humans; D007249:Inflammation / Q000188:drug therapy / Q000235:genetics* / Q000378:metabolism; D018836:Inflammation Mediators / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D062645:Percutaneous Coronary Intervention; D010974:Platelet Aggregation / Q000187:drug effects / Q000235:genetics*; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*; D010979:Platelet Function Tests; D011110:Polymorphism, Genetic / Q000235:genetics*; D011446:Prospective Studies
chemical_list: D015415:Biomarkers; D018836:Inflammation Mediators; D010975:Platelet Aggregation Inhibitors; D001189:Aryl Hydrocarbon Hydroxylases; C045793:CYP2C19 protein, human; D065731:Cytochrome P-450 CYP2C19